1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
* Copyright 2016 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef RTC_BASE_SANITIZER_H_
#define RTC_BASE_SANITIZER_H_
#include <stddef.h> // for size_t
#if defined(__has_feature)
#if __has_feature(address_sanitizer)
#define RTC_HAS_ASAN 1
#endif
#if __has_feature(memory_sanitizer)
#define RTC_HAS_MSAN 1
#endif
#endif
#ifndef RTC_HAS_ASAN
#define RTC_HAS_ASAN 0
#endif
#ifndef RTC_HAS_MSAN
#define RTC_HAS_MSAN 0
#endif
#if RTC_HAS_ASAN
#include <sanitizer/asan_interface.h>
#endif
#if RTC_HAS_MSAN
#include <sanitizer/msan_interface.h>
#endif
#ifdef __has_attribute
#if __has_attribute(no_sanitize)
#define RTC_NO_SANITIZE(what) __attribute__((no_sanitize(what)))
#endif
#endif
#ifndef RTC_NO_SANITIZE
#define RTC_NO_SANITIZE(what)
#endif
// Ask ASan to mark the memory range [ptr, ptr + element_size * num_elements)
// as being unaddressable, so that reads and writes are not allowed. ASan may
// narrow the range to the nearest alignment boundaries.
static inline void rtc_AsanPoison(const volatile void* ptr,
size_t element_size,
size_t num_elements) {
#if RTC_HAS_ASAN
ASAN_POISON_MEMORY_REGION(ptr, element_size * num_elements);
#endif
}
// Ask ASan to mark the memory range [ptr, ptr + element_size * num_elements)
// as being addressable, so that reads and writes are allowed. ASan may widen
// the range to the nearest alignment boundaries.
static inline void rtc_AsanUnpoison(const volatile void* ptr,
size_t element_size,
size_t num_elements) {
#if RTC_HAS_ASAN
ASAN_UNPOISON_MEMORY_REGION(ptr, element_size * num_elements);
#endif
}
// Ask MSan to mark the memory range [ptr, ptr + element_size * num_elements)
// as being uninitialized.
static inline void rtc_MsanMarkUninitialized(const volatile void* ptr,
size_t element_size,
size_t num_elements) {
#if RTC_HAS_MSAN
__msan_poison(ptr, element_size * num_elements);
#endif
}
// Force an MSan check (if any bits in the memory range [ptr, ptr +
// element_size * num_elements) are uninitialized the call will crash with an
// MSan report).
static inline void rtc_MsanCheckInitialized(const volatile void* ptr,
size_t element_size,
size_t num_elements) {
#if RTC_HAS_MSAN
__msan_check_mem_is_initialized(ptr, element_size * num_elements);
#endif
}
#ifdef __cplusplus
namespace rtc {
template <typename T>
inline void AsanPoison(const T& mem) {
rtc_AsanPoison(mem.data(), sizeof(mem.data()[0]), mem.size());
}
template <typename T>
inline void AsanUnpoison(const T& mem) {
rtc_AsanUnpoison(mem.data(), sizeof(mem.data()[0]), mem.size());
}
template <typename T>
inline void MsanMarkUninitialized(const T& mem) {
rtc_MsanMarkUninitialized(mem.data(), sizeof(mem.data()[0]), mem.size());
}
template <typename T>
inline void MsanCheckInitialized(const T& mem) {
rtc_MsanCheckInitialized(mem.data(), sizeof(mem.data()[0]), mem.size());
}
} // namespace rtc
#endif // __cplusplus
#endif // RTC_BASE_SANITIZER_H_
|
